The most important change to my practice in the past 10 years has been the introduction of the electric hand piece ,It has allowed me to do better dentistry for my patients .My tooth preparation are more precise,as done with less noise and vibration -another benefit for the patient.With the latest versions of electric motors and handpieces,the noise lever has become less and less-sometimes i check to be sure the bur is turning!Most of my patients comment on the difference in the sound ;that it makes their dental experience much better.